# PM Opc ROLC

From SublabWiki

## ROLC = Rotate Left through Carry

Hex | Mnemonic | Cycles |
---|---|---|

CE 90 | ROLC A | 12 |

CE 91 | ROLC B | 12 |

CE 92 nn | ROLC [N+#nn] | 20 |

CE 93 | ROLC [HL] | 16 |

### Execute

A = Register A B = Register B [N+#nn] = Memory: (I shl 16) or (N shl 8) or #nn [HL] = Memory: (I shl 16) or HL

; ROLC Ds ; ; Ds = Source/Destination Ds = (Ds SHL 1) OR Carry

### Description

"8-Bits Destination" bits are rotated left by 1 through Carry.

### Conditions

Zero: Set when result is 0

Carry: Set when old bit 7 is 1

Sign: Set when bit 7 of the result is 1

Overflow remain unchanged

### Examples

; A = 0x04 ; F = (Carry=0)ROLC A; A = 0x08 ; F = (Zero=0):(Carry=0):(Sign=0)

; B = 0x45 ; F = (Carry=1)ROLC B; B = 0x8B ; F = (Zero=0):(Carry=0):(Sign=1)

; B = 0x84 ; F = (Carry=0)ROLC B; B = 0x08 ; F = (Zero=0):(Carry=1):(Sign=0)

; [HL] = 0x80 ; F = (Carry=0)ROLC [HL]; [HL] = 0x00 ; F = (Zero=1):(Carry=1):(Sign=0)

; [HL] = 0x80 ; F = (Carry=1)ROLC [HL]; [HL] = 0x01 ; F = (Zero=0):(Carry=1):(Sign=0)